Irving Lefkowitz (July 8, 1921 – June 21, 2015) was an American control engineer and Professor Emeritus at the Case Western Reserve University who made significant contributions to process dynamics, advanced control, and computer-based integrated and hierarchical systems control. Lefkowitz was a Life Fellow of the IEEE Control Systems Society, and a recipient of the Richard E. Bellman Control Heritage Award (1982).^[1]

He began his career in the industry working for Seagram, first in Baltimore, and later in Louisville, where he became director of corporate instrumentation and control research.^[2]